diplodocus.org Git - nmh/blob - uip/whatnowproc.c

   1 /* whatnowproc.c -- exec the "whatnowproc"
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include "h/mh.h"
   9 #include "sbr/context_save.h"
  10 #include "sbr/error.h"
  11 #include "h/done.h"
  12
  13
  14 /*
  15  * This routine is used by comp, repl, forw, and dist to exec
  16  * the "whatnowproc".  It first sets up all the environment
  17  * variables that the "whatnowproc" will need to check, and
  18  * then execs the command.  As an optimization, if the
  19  * "whatnowproc" is the nmh command "whatnow" (typical case),
  20  * it will call this routine directly without exec'ing it.
  21  */
  22
  23
  24 int
  25 what_now (char *ed, int nedit, int use, char *file, char *altmsg, int dist,
  26           struct msgs *mp, char *text, int inplace, char *cwd, int atfile)
  27 {
  28     bool found;
  29     int k, msgnum, vecp;
  30     int len, buflen;
  31     char *bp;
  32     char buffer[BUFSIZ], *vec[MAXARGS];
  33
  34     vecp = 0;
  35     vec[vecp++] = r1bindex (whatnowproc, '/');
  36     vec[vecp] = NULL;
  37
  38     setenv("mhdraft", file, 1);
  39     if (mp)
  40         setenv("mhfolder", mp->foldpath, 1);
  41     else
  42         unsetenv("mhfolder");
  43     if (altmsg) {
  44         if (mp == NULL || *altmsg == '/' || cwd == NULL)
  45             setenv("mhaltmsg", altmsg, 1);
  46         else {
  47             snprintf (buffer, sizeof(buffer), "%s/%s", mp->foldpath, altmsg);
  48             setenv("mhaltmsg", buffer, 1);
  49         }
  50     } else {
  51         unsetenv("mhaltmsg");
  52     }
  53     if ((bp = getenv ("mhaltmsg")))/* XXX */
  54         setenv("editalt", bp, 1);
  55     snprintf (buffer, sizeof(buffer), "%d", dist);
  56     setenv("mhdist", buffer, 1);
  57     if (nedit) {
  58         unsetenv("mheditor");
  59     } else {
  60         if (!ed)
  61             ed = get_default_editor();
  62         setenv("mheditor", ed, 1);
  63     }
  64     snprintf (buffer, sizeof(buffer), "%d", use);
  65     setenv("mhuse", buffer, 1);
  66     snprintf (buffer, sizeof(buffer), "%d", atfile);
  67     setenv("mhatfile", buffer, 1);
  68
  69     unsetenv("mhmessages");
  70     unsetenv("mhannotate");
  71     unsetenv("mhinplace");
  72
  73     if (text && mp && !is_readonly(mp)) {
  74         found = false;
  75         bp = buffer;
  76         buflen = sizeof(buffer);
  77         for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++) {
  78             if (is_selected(mp, msgnum)) {
  79                 snprintf (bp, buflen, "%s%s", found ? " " : "", m_name (msgnum));
  80                 len = strlen (bp);
  81                 bp += len;
  82                 buflen -= len;
  83                 for (k = msgnum + 1; k <= mp->hghmsg && is_selected(mp, k); k++)
  84                     continue;
  85                 if (--k > msgnum) {
  86                     snprintf (bp, buflen, "-%s", m_name (k));
  87                     len = strlen (bp);
  88                     bp += len;
  89                     buflen -= len;
  90                 }
  91                 msgnum = k + 1;
  92                 found = true;
  93             }
  94         }
  95         if (found) {
  96             setenv("mhmessages", buffer, 1);
  97             setenv("mhannotate", text, 1);
  98             snprintf (buffer, sizeof(buffer), "%d", inplace);
  99             setenv("mhinplace", buffer, 1);
 100         }
 101     }
 102
 103     context_save ();    /* save the context file */
 104     fflush (stdout);
 105
 106     if (cwd) {
 107         if (chdir (cwd) < 0) {
 108             advise (cwd, "chdir");
 109         }
 110     }
 111
 112     /*
 113      * If the "whatnowproc" is the nmh command "whatnow",
 114      * we run it internally, rather than exec'ing it.
 115      */
 116     if (strcmp (vec[0], "whatnow") == 0) {
 117         WhatNow (vecp, vec);
 118         done (0);
 119     }
 120
 121     execvp (whatnowproc, vec);
 122     fprintf (stderr, "unable to exec ");
 123     perror (whatnowproc);
 124
 125     return 0;
 126 }